There are a number of different spiders that could be described as black spiders with a red dot on their back including the Black Widow, the Australian Redback spider and the Jumping Spider.
Black widow spiders are perhaps the best known of the latrodectus genus of spiders. They are fairly dangerous spiders. The female black widow's bite is particularly harmful to humans because of their unusually large venom glands. Not all adult female black widows exhibit the red hourglass on their abdomen, some may instead have a pair of red spots or they may have no marking at all. However any markings that they do have will be bright red. Adult male black widows are about a quarter the size of the female and are normally grey or brown instead of black and red. The bite of a male black widow is not considered to be dangerous to humans.
Alternatively, the description of a black spider with a red spot could also match that of an Australian Redback spider. This is another spider which is extremely dangerous to humans; it is considered one of the most dangerous spiders in its native Australia. The Redback has a neurotoxic venom which is toxic to humans and causes severe pain if someone is bitten by them.
Jumping spiders are a large family of spiders containing over 500 described genera and about 5,000 described species. They make up about 13 per cent of all species of spiders. They come in a variety of colors and patterns but some members of the species are known to be black spiders with red spots. Spiders matching this particular description have been found in Colorado, USA among other places.
Black widow spiders are perhaps the best known of the latrodectus genus of spiders. They are fairly dangerous spiders. The female black widow's bite is particularly harmful to humans because of their unusually large venom glands. Not all adult female black widows exhibit the red hourglass on their abdomen, some may instead have a pair of red spots or they may have no marking at all. However any markings that they do have will be bright red. Adult male black widows are about a quarter the size of the female and are normally grey or brown instead of black and red. The bite of a male black widow is not considered to be dangerous to humans.
Alternatively, the description of a black spider with a red spot could also match that of an Australian Redback spider. This is another spider which is extremely dangerous to humans; it is considered one of the most dangerous spiders in its native Australia. The Redback has a neurotoxic venom which is toxic to humans and causes severe pain if someone is bitten by them.
Jumping spiders are a large family of spiders containing over 500 described genera and about 5,000 described species. They make up about 13 per cent of all species of spiders. They come in a variety of colors and patterns but some members of the species are known to be black spiders with red spots. Spiders matching this particular description have been found in Colorado, USA among other places.
